Friction-clutch and the like



PER ERIK NORDQVIST. FRICTION CLUTCH AND THE LIKE.

APPLICATION FILED APR. I5. |920.

1 ,3 918 ,-5 64, Patented Nov. 29, 1921.

fifty.

UNITED sra'rss eater-ir aerien.

PER ERIK NonDQvIsfr, or Dorno, snNnnYBnnGr/swnnnn.

FRICTION-CLUTCH AND THE LIKE.

y y Application ined Aprii i5,

To all 'whomc't may concern:

Be it known that 1 PEP. ERIK ,NonnQvisn a subject of the King of Sweden, residing at Dufbo, Sundbyberg, Sweden, have invented certain new and useful improvements in Friction-Clutches and the like, of whiclitlie following is a specification.,`

This invention relates to friction clutches of that type, which consist of an inner divided friction member or ring, which is eX- panded and forced against an outer member or disk by means of lever-mechanisms provided at the division points respectively. The characteristic feature of the invention consists in the said lever-mechanism comprising a two-armed lever, which is swingable longitudinally of the shaft and the' one arm of which by means of a ball-joint is connected with the adjacent ends of two links extending transversely of the shaft in such manner, that by the swinging of the said lever the inner ends of the links are moved longitudinally of the shaft and the links force the adjacent ends of the friction ring away from one another,tlie other (inner) arm of the said lever being connected with a rod slidable longitudinally of the shaft and adapted to swing the lever. Owing-to the said arrangement the expansion-mechanism may be inclosed within'the outer friction member and shifted from outside, so that the clutch can be rendered dust-tight.

In the accompanying drawing, wherein a proposed embodiment of the invention is illustrated s Figure 1 is a cross section of the improved clutch;

Fig. 2 is a side elevation thereof, partially in section;

Fig. 2EL is a view similar to Fig. 2, of a slightly modified form of the invention;

Fig. 3 is a section on the line 3-3 of Fig. l.

Referring to the drawing in detail '1 indicates a shaft to which the two parts of an inner divided friction member or ring are fixed by means of screw-bolts Y3. An outer member or disk 4, which may serve as a belt pulley, incloses the inner clutch-member and is journaled on the shaft 1 by means of ballbearings 5. Between the halves 2, 2 ofthe inner member and on opposite sides of the shaft 1 two two-armed levers 7 are pivoted at G, which at their inner ends are jointed to two rods 8 respectively, movable longitudi- Specification of Letters Patent. y Patented N'Qw, 29,

le20. serial No. 374,155.Y

nally of the shaft and shiftable in the'known manner by means of a sleeve 9 and a hand lever 10. The outer ends 11 of the levers 7 are'ball-shaped and engage the cup-shaped ends oftwo pairs of links 12, 12 respectively.

The other ends of the said links are provided friction member and the outer disk 4. The. said pads may however be omitted.

The clutch operates in the following manner: For the connecting of the normally free outer disk 4 with the Vshaft 1 the sleeve 9 is jmoved to the position shown in Fig. 2during whichoperation the levers 7 are swung and the links 12 are shifted from the position shown by dotted lines in Fig. 3tothe position shown by full lines inthe said iigure (see lines A and B, Fig. 3).V The two Y halves 2, 2 of the inner clutch member are thus forced against the inner side 0f the outer disk 4, so that the latter is connected with the shaft by friction. For the disconnecting of the disk from the shaft the sleeve 9 is moved away from the clutch, so that the links are returned to the position shown by dotted lines in Fig. The halvesv 2, 2fare then returned to their initial position acted upon by the inherent resiliency of the' ring halves, so that the disk 4 is released. In the form of the invention illustrated in Figs. 1 and 2 and described above the outer member of the clutch is arranged like a beltpulley so that the device will operate as an ordinary pulley provided with a friction clutch.

The invention may, evidently, be ap lied 'j to Vfriction brakes (safety-brakes), in w lich lcase the outer disk 4 is made stationary in any suitable manner.r The clutch may be used also for connecting the ends of ltwo shafts, as suggested in Fig. 2a. rfhe outer disk 4 is then provided with a sleeve 18 which by means of a key or in any other suitable manner is fixed to the end of thev shaft 19, located on a line with the shaftv l, s0 that the shaft 19 partakes in the rotary motion of the shaft l, when the clutch has been brought into operative position. Y*

n each form o' the invention, the outer member of the clutch is of such construction as to afford a easing for the operating mechanism for the inner expansible clutch member and consequently the'latter is effectively protected against the admission of dust or such other foreign matter as would be detrimental to the enieieney and life of the clutch.y

I Claim:

In a eluteh, en inner clutch element Composed oi a plurality of relatively movable parts, an outer clutch member engageable by the parts of the inner clutch element and constituting a dust-proof easing for the proteetion of said inner clutch member, pairs of links interposed between the parts of the inner clutch element andsivivelly connected therewithj levers )pivotallyV mounted between the parts of the inner clutch element and 

